Fiber board drum with plastic chime assembly

Abstract

A chime assembly shaped to fit on the upper opening of a drum to receive a top and a closing ring. The chime assembly comprises a top chime having a lower band with a slot shaped to receive the upper opening of a drum. The top chime has a top flange and an upper annular portion having an annular groove shaped to receive a sealing ring. The top flange comprises a substantially axially-extending wall and a substantially radially extending flange positioned to be engaged by the cover. The chime assembly further comprises a bottom flange comprising an annular lower side wall, an annular radially-inwardly extending support surface, and a downwardly-projecting annular glide ring to contact a support surface and thereby elevate the drum from the ground surface. The chime assembly is preferably entirely plastic.

What is claimed is: 
     
       1. A fiber board drum comprising: a substantially cylindrical fiber drum shell having a bottom and a side wall extending upwardly from said bottom and defining an upper opening; and   a chime attached about said upper opening and having: a lower band at a lower end thereof, said lower band having a downwardly-opening slot receiving an upper end of said side wall therein in a fixed manner to prevent relative movement between said chime and said side wall,   an upper portion positioned above and unitary with said lower band, said upper portion including an annular groove positioned above said downwardly-opening slot and recessed to receive a lower leg of a closing ring therein, an axially extending wall extending upwardly from said annular groove and a top flange extending radially inwardly from an upper end of said axially extending wall,   said axially extending wall and said radially extending flange being shaped to receive a cover, and   wherein said chime is made entirely of plastic material.     
     
     
       2. The fiber board drum of claim 1 further comprising: a bottom chime, said bottom chime having: a lower side wall extending around a lower portion of said lower side wall of said fiber board drum shell;   an annular support surface extending radially inward from said side wall;   an annular glide ring extending downwardly from said support surface; and   said bottom chime is made entirely of plastic.     
     
     
       3. A fiber board drum comprising: a substantially cylindrical fiber drum shell having a bottom, a ridge portion extending around an inner perimeter of said bottom, and a side wall extending upwardly from said ridge portion and defining an upper opening; and   a top chime having a lower band at a lower end thereof, said lower band having a downwardly-opening slot receiving an upper end of said side wall therein,   an upper annular portion, positioned above and unitary with said lower band, shaped to receive a cover thereon, said upper portion including an annular groove adjacent and connected to said downwardly-opening slot and shaped to receive a lower leg of a closing ring therein, an axially extending wall extending upwardly from said annular groove and a top flange extending radially inwardly from an upper end of said axially extending wall,   said axially extending wall and said radially extending flange being shaped to receive said cover, and   wherein said top chime is made entirely of plastic material.     
     
     
       4. The fiber board drum of claim 3 further comprising a bottom chime, said bottom chime comprising: a lower side wall extending around said side wall of said drum shell adjacent to said ridge portion of said dram shell;   an annular, radially inwardly extending support surface extending from said lower side wall of said bottom chime and shaped to support said ridge portion of said drum shell;   a downwardly-projecting annular glide ring attached to said support surface; and   said bottom chime is made of plastic.   
     
     
       5. The fiber board drum of claim 4 wherein said lower side wall, support surface and glide ring are unitary in construction. 
     
     
       6. The fiber board drum of claim 4 wherein said top and bottom chimes each have a cross section, said top and bottom chimes each being formed by extrusion of said cross section of each of said top and bottom chimes. 
     
     
       7. The fiber board drum of claim 6 wherein said top and bottom chimes each are formed into a closed loop by butt welding. 
     
     
       8. The fiber board drum of claim 7 wherein said top and bottom chime each are attached to said drum by affixing means. 
     
     
       9. The fiber board drum of claim 8 wherein said affixing means includes adhesives. 
     
     
       10. The fiber board drum of claim 9 wherein said top chime and bottom chime are substantially circular in plan view. 
     
     
       11. The fiber board drum of claim 4 wherein said top and bottom chimes each are formed by injection molding. 
     
     
       12. A method of producing a fiber board drum comprising the steps of: selecting a substantially cylindrical fiber drum shell having a bottom, a ridge portion extending around an inner perimeter of said bottom, and a side wall extending upwardly from said ridge portion and defining an upper opening; and   forming an upper chime having a lower band at a lower end thereof, said lower band having a downwardly-opening slot and attaching said upper chime by inserting an upper end of said side wall into said slot,   said forming step also including forming said upper chime to have an upper portion unitary with and positioned above said lower band, said upper portion shaped to receive a cover thereon, said upper portion including an annular groove extending about a radially outer side of said annular portion and above said downwardly-opening slot and shaped to receive a lower leg of a closing ring therein, an axially extending wall extending upwardly from said annular groove and a top flange extending radially inwardly from an upper end of said axially extending wall,   said axially extending wall and said radially extending flange being shaped to receive said cover, and   wherein said upper chime is made entirely of plastic material.   
     
     
       13. The method of claim 12 further comprising the steps of: forming a bottom chime, said bottom chime comprising an annular lower side wall shaped to receive and overlap a portion of said side wall adjacent to said ridge portion, an annular, radially inwardly extending support surface adjacent to said side wall and shaped to support said ridge portion, and a downwardly-projecting annular glide ring attached to said support surface, wherein said bottom chime is made of plastic material; and   attaching said bottom chime to said fiber drum bottom around said side wall.   
     
     
       14. The method of claim 13 wherein said bottom chime forming step includes forming said lower side wall, support surface and glide ring as a unitary construction. 
     
     
       15. The method of claim 13 wherein in each of said forming steps said upper and bottom chime are formed into a closed loop by butt welding. 
     
     
       16. The method of claim 15 wherein each of said attaching steps includes attaching said upper chime and said bottom chime by adhesives. 
     
     
       17. The method of claim 13 wherein said forming steps each include forming by injection molding.